Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60bcef32636ea8a…

MALICIOUS

PDF

80.8 KB Created: 2021-03-05 11:27:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 02899ee39aa70cb9115760d7482fb40c SHA-1: d98968a87014b7df0ccc51c6f4188b0de10686ce SHA-256: d60bcef32636ea8a8ebf96d83441c365502dfcd48815575f2686392e08d8f9b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which are part of a link farm, suggesting an attempt to manipulate search engine results or direct users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically related to phishing. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs point towards a phishing or SEO spam attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/award?keyword=the+practicing+mind+book+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475728/normal_5fd92d6b2e5c8.pdfIn PDF document text
    • http://cesaregaspari.com/destiny_s_child_members_originaliz3x1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403560/normal_60382bdebeb96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416299/normal_5fc930d5e9633.pdfIn PDF document text
    • http://eglo.club/plc_programming_ladder_logic_examples_pptsh3cl.pdfIn PDF document text
    • http://rubisteq.online/docker_compose_commands_cheat_sheetyc40a.pdfIn PDF document text
    • http://okrasote.info/28616323734w5607.pdfIn PDF document text
    • http://gonzo-3d.com/sql_format_datetime_to_just_datepazi2.pdfIn PDF document text
    • http://maslovauto.ru/3059462259457nwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464720/normal_5feec3ecc2774.pdfIn PDF document text
    • http://phtech.site/how_to_install_leviton_motion_sensor_3_way_light_switchghvr7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/jivamubug/84650645654.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/bloons_td_5_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/94020908625.pdfIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_1efac19a80da405bbad95555d9f99471.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/sony_hdv_1080i_video_camera_manual.pdfIn PDF document text
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_de77b6dc5cf043099143527c1dcfab3e.pdf?index=trueIn PDF document text
    • https://b6c9d0de-81a1-4db9-ab7d-8a95af9e63d6.filesusr.com/ugd/b28ae2_dec7e168211341ac83f9cb6ba7239093.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/latufenaw/junon.pdfIn PDF document text
    • https://006b50d4-ad2a-4261-8279-34542eb0d7b0.filesusr.com/ugd/a640e9_f98f8ba6c3fe472cba699e18e24d3134.pdf?index=trueIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_f91d2effc0fb453583777231f3e4e1df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tinezedu/28837002995.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D9 5592 bytes
SHA-256: 95b78e193645549f6dd41722b35c30264172b52941d21503aa31543572cfb41c
font_01_sfnt_off000104aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AA 10136 bytes
SHA-256: 7dd9abbaa17638e2f4688e8a56e5238df33cfad0096fe75ab8865cb3788571b1
font_02_sfnt_off00012767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12767 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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